These cross-country differences may provide information on the effectiveness of national health systems. However, they may also reflect other factors—such as differences in research methods, sample sizes, sample periods and variable definitions. This paper re-examines differences between American and English income gradients in children’s health, paying careful attention to these issues. We find that, when the English sample is expanded by adding three years of data, and is compared to American data from the same time period, the income gradient in children’s health increases with age by the same amount in the two countries. It is still the case.
